diff --git a/tools/gpio/gpio-event-mon.c b/tools/gpio/gpio-event-mon.c
index 6c122952c589..5dee2b98ab60 100644
--- a/tools/gpio/gpio-event-mon.c
+++ b/tools/gpio/gpio-event-mon.c
@@ -86,6 +86,7 @@ int monitor_device(const char *device_name,
 			gpiotools_test_bit(values.bits, i));
 	}
 
+	i = 0;
 	while (1) {
 		struct gpio_v2_line_event event;